In the ACE Model:warning messages during my data analysis

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Picture of user. Zhenzhen Joined: 12/14/2020
Dear developer:

When I use ACE model to calculate heritability,I got a warning messages during the analysis(See Attachment). Is there a problem with my data and will it affect the results?
when there was a warning message, I found that the estimated results will change under different start values.

Could you please provide me more details?
Thank you very much.

Best regards,
Zhenzhen Luo